/*
 * Copyright 2022 VMware, Inc.
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *
 */

package org.dbsp.util;

import javax.annotation.Nullable;

/** Utility interface providing some useful casting methods. */
public interface ICastable {
    @Nullable
    default <T> T as(Class<T> clazz) {
        return ICastable.as(this, clazz);
    }

    @Nullable
    static <T> T as(Object obj, Class<T> clazz) {
        if (clazz.isInstance(obj))
            return clazz.cast(obj);
        return null;
    }

    default <T> T to(Class<T> clazz) {
        T result = this.as(clazz);
        if (result == null)
            throw new RuntimeException(this + " is not an instance of " + clazz);
        return result;
    }

    default <T> boolean is(Class<T> clazz) {
        return clazz.isInstance(this);
    }
}
